Name

VK_KHR_vulkan_memory_model - device extension

VK_KHR_vulkan_memory_model

Name String

VK_KHR_vulkan_memory_model

Extension Type

Device extension

Registered Extension Number

212

Revision

3

Ratification Status

Ratified

Extension and Version Dependencies

VK_KHR_get_physical_device_properties2

Deprecation State

• Promoted to Vulkan 1.2

Contact

• Jeff Bolz @jeffbolznv%0A*Here describe the issue or question you have about the VK_KHR_vulkan_memory_model extension*

Other Extension Metadata

Last Modified Date

2018-12-10

IP Status

No known IP claims.

Interactions and External Dependencies

• Promoted to Vulkan 1.2 Core
• This extension requires SPV_KHR_vulkan_memory_model

Contributors

• Jeff Bolz, NVIDIA
• Alan Baker, Google
• Tobias Hector, AMD
• David Neto, Google
• Robert Simpson, Qualcomm Technologies, Inc.
• Brian Sumner, AMD

Description

The VK_KHR_vulkan_memory_model extension allows use of the features guarded by the VulkanMemoryModel, VulkanMemoryModelDeviceScope, and VulkanMemoryModelAvailabilityVisibilityChains capabilities in shader modules. The Vulkan Memory Model formally defines how to synchronize memory accesses to the same memory locations performed by multiple shader invocations.

Note

Version 3 of the spec added a member (vulkanMemoryModelAvailabilityVisibilityChains) to PhysicalDeviceVulkanMemoryModelFeaturesKHR, which is an incompatible change from version 2.

Promotion to Vulkan 1.2

All functionality in this extension is included in core Vulkan 1.2, with the KHR suffix omitted. However, if Vulkan 1.2 is supported and this extension is not, the vulkanMemoryModel capability is optional. The original type, enum and command names are still available as aliases of the core functionality.

New Structures

• Extending PhysicalDeviceFeatures2, DeviceCreateInfo:

  • PhysicalDeviceVulkanMemoryModelFeaturesKHR

New Enum Constants

• KHR_VULKAN_MEMORY_MODEL_EXTENSION_NAME

• KHR_VULKAN_MEMORY_MODEL_SPEC_VERSION

• Extending StructureType:

  • STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_MEMORY_MODEL_FEATURES_KHR

New SPIR-V Capabilities

• VulkanMemoryModelKHR

Version History

• Revision 1, 2018-06-24 (Jeff Bolz)

  • Initial draft

• Revision 3, 2018-12-10 (Jeff Bolz)

  • Add vulkanMemoryModelAvailabilityVisibilityChains member to the VkPhysicalDeviceVulkanMemoryModelFeaturesKHR structure.

See Also

PhysicalDeviceVulkanMemoryModelFeaturesKHR

Document Notes

For more information, see the Vulkan Specification

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